通过水热反应和后续碳化制备了ZnO/C负极材料,并研究了其微观形貌、元素组成、结构和电化学储钾性能。结果表明:ZnO/C粉末呈现由纳米棒组成的直径为6～8μm的海胆状形貌,其中单个纳米棒的直径约为233nm,长度约为3.6μm;在0.1A/g循环充/放电时,海胆状ZnO/C负极的初始放电比容量为339.2mAh/g,可逆放电比容量为228.2mAh/g,即使在高电流密度1A/g循环1000圈时,可逆放电比容量仍保持在119.7mAh/g以上,表现了良好的电化学储钾性能。
ZnO/C anode material was prepared by hydrothermal reaction and subsequent carbonization.The microstructure,elemental composition,structure and electrochemical K-storage performances of the anode materials were studied.The results shown that ZnO/C powder manifested sea-urchin-like morphology with the diameter of 6～8μm,in which the length and diameter of a single ZnO nanorod was about 233nm and 3.6μm,respectively.The initial discharge specific capacity of the sea-urchin-like ZnO/C was 339.2mAh/g at the current density of 0.1A/g,and the corresponding reversible discharge specific capacity was 228.2mAh/g.Even cycling at high current density of 1A/g for 1000 cycles,the reversible discharge specific capacity remained 119.7mAh/g,indicating good electrochemical K-storage performances.
[1] 张鼎,燕永旺,史文静,等.钾离子电池研究进展[J].化工进展,2018,37(10):79-87.
[2] 王振,韩坤,徐丽,等.钾离子电池电极材料研究进展[J].硅酸盐学报,2020,48(7):1013-1024.
[3] Sultana I,Rahman M M,Mateti S,et al.K-ion and Na-ion storage performances of Co3O4-Fe2O3 nanoparticle-decorated super P carbon black prepared by a ball milling process[J].Nanoscale,2017,9(10):3646-3654.
[4] Suo G Q,Li D,Feng L,et al.SnO2 nanosheets grown on stainless steel mesh as a binder free anode for potassium ion batteries[J].Journal of Electroanalytical Chemistry,2019,833:113-118.
[5] 王艳香,高智丹,范学运,等.水热法制备多级结构ZnO微球及其电池性能[J].硅酸盐学报,2016,3(1):29-36.
[6] Ashraf M A,Liu Z L,Li C,et al.Zinc oxide and germanium dioxide adsorbed on silicon nanocage as anodes in lithium-ion battery and potassium-ion battery[J].Ionics,2020,26(5):2211-2215.
[7] Gao Y J,Zhang W C,Wu X L,et al.Hydrothermal self-assembling of ZnO nanorods into sphere-like superstructures and their optical characteristics[J].Applied Surface Science,2008,255(5):1982-1987.
[8] 侯宏英,段继祥,廖启书,等.多级ZnO纳米片/Fe负极的制备及锂电性能[J].硅酸盐学报,2018,46(1):35-39.
[9] Hou H Y,Yu C Y,Liu X X,et al.The effect of carbonization temperature of waste cigarette butts on Na-storage capacity of N-doped hard carbon anode[J].Chemical Papers,2019,73(5):1237-1246.
[10] Pan Q M,Qin L M,Liu J,et al.Flower-like ZnO-NiO-C films with high reversible capacity and rate capability for lithium-ion batteries[J].Electrochimica Acta,2010,55(20):5780-5785.
[11] 李佳慧,张晶,芮秉龙,等.MXene及其复合材料在钠/钾离子电池中的应用[J].化学进展,2019,31(9):1283-1292.
[12] Lei K X,Wang C C,Liu L J,et al.A porous network of bismuth used as the anode material for high-energy-density potassium-ion batteries[J].Angewandte Chemie International Edition,2018,57(17):4687-4691.
[13] Chu J H,Wang W A,Feng J R,et al.Deeply nesting zinc sulfide dendrites in tertiary hierarchical structure for potassium ion batteries:enhanced conductivity from interior to exterior[J].ACS Nano,2019,13(6):6906-6916.
[14] Hou H,Dai Z P,Liu X X,et al.Reutilization of the expired tetracycline for lithium ion battery anode[J].Science of the Total Environment,2018,630:495-501.
[15] Xie Q H,Zhang X Q,Wu X B,et al.Yolk-shell ZnO-C microspheres with enhanced electrochemical performance as anode material for lithium ion batteries[J].Electrochimica Acta,2014,125:659-665.
[16] Wang X Y,Hao H,Liu J L,et al.A novel method for preparation of macroposous lithium nickel manganese oxygen as cathode material for lithium ion batteries[J].Electrochimica Acta,2011,56(11):4065-4069.
基金资助
云南省第十九批中青年学术技术带头人资助项目(1097-10978240)
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